Friction driving mechanism



Nov. l, 1927. g L I 1,647,412

' C.'MCPHERSON FRICTION DRIVNG MECHANISM Filed NOV. 17, 1924 FIC:Y 2.

FITTORNEY 10 form of the invention.`

.Patented Nov. l, i927 i f i f A 19eme* ,S @M5555 f inertia teme? jcnAnLns Mernnisson, or Mortensen' arianne, CANADA; Assrenot'vitnsivn As-` sIGNMnNTs, "ro rnrorrou `rownrt oonronnrrciv- LEMITED, or MonrRnAL,"QUE'- Bric, cANAnii.

rmc'rronfnarvrne .iancianivism v Appnano sieanovrember 1'?, 1921i. `ser-iai no. 759,437.

The invention relates to a friction driving mechanism, as described in theI present specirfication andillustrated in the accompanying drawings that form partV of the same. u

The invention consists essent'ally of .the nov-el -features :of c construction pointed out broadly and specifically vin the claims for` novelty following a description containing anexplanatlon 1n4v detail-of an acceptable rlhe objects of the invention the bad effects of an end thrust in friction gearing; to support the balancing friction rollers, so that the bracket support may ac v commodate itself to the vibration or other movements occurring as between vengaging rollers and disk; to insure flexibility in transmission devices and the maximum power notwithstanding ldisturbances due to temporary displacements of disk or rollers; andl to provide an. eiicient and serviceable driving mechanism for the betterment of equipments requiring mobility independently in the members communicating the power. p In the drawings Figure l is a longitudinal sectional view of the cross arm vand roller bracket and the stationary supporting bar.

Figure 2 is` a yplan view of the supporting bar and cross armkand roller bracket. Y f Figure 3 is a vertical sectional view of the rmechanism. Y

Figure eis a longitudinal view showing a 'modification of the sliding mechanism partially sectional.

Figure 5 is a cross sectional detail of the ball bearings. p

- Like numerals of reference indicate correspending partsin the various figures.

Y Referring to the drawings, the disk 5 is shown as fixedly mounted on a driven shaft 6 and engaged by the rollers 7 and 8 on either side.

The rollers 7 and 8A are journalled in the forked ends of the rocker arms 9 and 10.

'The bracket 11 for the support of the rocker arms 9 and 10 is here shown as formed -of the parallel walls 11 and 12 havingthe pivotal bearings 13 and let at the lower ends.

l at their upper ends secured to or forming part with the bar 15.

vThe bar 15 at the outer ends has the trolleyV bearings 16 and 17 with the threaded stems .l 'i p i 1S and 19 held by the nuts 20v'and 21 and are to avoidVv these-.bearings .the trolley wheels22 ,and 23 roll on the track 24 havingv the `slots 25 and 26'for, the stems 13 and y19, thereby suspending Athe. bracket lfrom the track 241C which is I preferablya rigidly secured bar .independa` ent or vforming partlof the support for'the p bearing of .theshaft'flon whichftlie diskuis iixedly mounted. Y

- It will thus be seen that ywhile 'the isy in a fixed position on the shaft 6, the rollersl are in constant engagementV with said disk being held thereto by the spring 25a intro.

duced between the ends of the said rocker armsk 9 and Q10'y and even if there," are considerable variations of positions of shaftf` and the frame of which the track 24 forms a part the bracket will yslide in the frame and thereby keep the rocker arms still in the same 'f state Aregarding the spring pressure forthe,

distance remains xed and the only effect of the slidingof the bracketV isto alter slightly the angle of the arms without mov ing the rollers from their.engagement.` i

It is of course understood may be sho-wn of 'sliding the rockery arm bracket and that solong as thebracket isi supported in waysthat will insure flexibility., regarding all movements for the lateralslidv ingy motion the object of this invention will that other vways be attainedas the helical spring between the arms also permits a. freedom of motion, that naturally. assists the sliding mechanism withoutany loosening ofthe grip of the rollers.

alongis shown in Figures 4 and 5, in which the'lugs'27 extend from the base 28 of the bracket 29 into rings 30 enclosing the ball c Anotherineans of` sliding the vbracket bearings 31. The rod 32 forming the rigid C support extends throughthe bearings 31 andl thus an easy ridinglnechanism is assurred f as the rod 32 forms a rail kon which the balls n 1 ro-ll very Vsmoothly-.and with the facilityv that is sowell known of bea-rings of this f type.

engaging lsaid disk.`

2. In friction driving-mechanism, ai track way,fa bracket forming'a carriage travelling on said track way, a xedly securedl on so i a driven shaft adjacent to said bracket, and a pair of friction rollers resilient-ly supported by said bracket and adapted to engage said disc. i 4

3. In friction driving mechanism, a track- Way, a bracket, forming a carriage travelling Aon said trackway, a disk, a pair of friction rollers engaging either side of said disk, a pair of roller arms pivotally mounted in said bracket and having bearings for said rollers spring-held to` their Contact notwithstanding the angular displacement of sai-d arms due to the movement of said carriage. 4. In friction driving mechanism, a disk, suitably mounted rollers engaging said disk and balancing the thrust, pivoted'arms supporting said rollers and a bracket for said arms freely movable according to the varia* tions between the positions of the roller sup- 20 port and disk support.

5. In friction driving mechanism, a disk.,

suitably mounted rollers engaging said disk vand balancing the thrust, pivoted arms supporting said rollers, spring mechanism holding said arms, a trackway and roller bearing, and a bracket supported from said bearing and forminga pivotal support for sai-d spring-held arms.

' 6. ln friction driving mechanism, a disk, suitably mounted rollers engaging said disk and balancing the thrust, pivoted arms forming` pivot bearings for said rollers at the ends, ball bearing brackets slidably mounted, a gliding bearing member supporting said arms and carried by saidv ballv bearing brackets from said shaft and a shaft support forming a truck for sai-d ball bearing brackets.

Signed at Montreal, Canada this 15th day of November, 1924.

errantes Monnaieson.7u 

